Trolley-wheel.



G. E. SMITH. TROLLEY WHEEL. APPLICATION FILED APR. 17, 1911.

Patented Oct. 29, 1912.

E 7 Q i w a a $2 CHARLIE? series.

SMITH, 0F SHERMAN,

IBOLLEY-WHEEL.

To aZZ whom it may concern Be it known that I, CHAnLn-Y E. SMITH, acitizen of the United States, residing at Sherman, in the county ofGrayson and State ot Texas, have invented a new and usefulTrolley-.Vheel, of which the following is a specification.

This invention relates to trolley wheels, and has for its object toprovide an axle therefor having Wear compensating and contact blocksmountedtherein and means spreading thc'sa-id blocks within the hub ofthe wheel. This object is accomplished by the construction describedbelow and shown in the drawings Wherein- Figure 1 is a side elevation'ofthis trolley wheel partly broken away. Fig. 2 is a central transversesectional view thereof. 3 is a pe spective view of the axle, and 4 is aperspective view of one or" the wearcompensating and Contact blocks.

Referring in detail to the drawings, the numeral 5 designates thegrooved rim which .has the internal screw-threads 6, and the numerab 7designates the hub which is formed with an annular oil-chamber in oneend thereof to form the outer and inner walls 8 and 10, respectively.The open side of the annular oil-chamber is closed by a cap 11 havingconcentric annular flanges l3 and 12., the former flange beingscrew-threaded into the Wall 8 as designated by the numeral 14 and theflange 12 fitting over the edge of the Wall 10. The cap 11 is providedin its outer face with sockets 15 for the application of a spannerWrench by means of which the cap may be rotated to be attached ordetached from the hub 7. The hub 7 is provided in its closed end with ascrew-threaded aperture closed by a screw-plug 16, and by removing theplug itwill be seen that the oil or other lubricant may be readilypoured into the. oil-chamber. A bushing 17 fits Within the inner wall10, and the said bush- .ing is held against rotation by means oi. a pin18 which is driven into the registering grooves 50 and 51 in the outerface of the bushing and inner face of the Wall, respectively. The rim 5is attached upon the hub 7 by means of the screw-threads G which areengaged upon similar threads upon the periphery of the hub, and the saidrim and hub are constrained against rotation rela- Speeification ofLetters Patent.

Application filed April 1?, 1811.

l l I ,l l l l l l l l i t l Patented @ct. 29,1912.

Serial 370. 621,527.

tive to each other by driven through registering grooves in the adjacentfaces of the rim and hub. Thus it will be seen that the rim, hub,bushing and the cap rotate with each other.

The axle comprises a tubular member 20 having the internal screw-threads21 at its extremities and having elongated or rectangular openings 22intermediate its ends. There are preferably two of these openings, andin each of the openings is arranged a rectangular wearcompensating andcontactbloclr 23, the said blocks fitting snugly in the said openingsfor radial reciprocatory movement, and the outer face 2% of each of theblocks is curved or convexed to conform with thecurvature of the bushing17. These blocks 23 have complementary semi-conical grooves 25 in theends thereof, and conical Spreaders 26 are engaged in the respectivegrooves. The spreaders 26 are forced inwardly by means of coil springs27 compressibly disposed between the said spreaders and flanged caps 28screw-threaded into the ends of the axle, which caps have flanges oflarger diameter tha n..the Pins 29 are also passed through the ends ofthe axle over the outer ends of the springs 27.

The axle 20 is arranged within the hub '7 and fits within the bushing17, the openings 22 being arranged Within the hub and the blocks 23contacting with the bushing to lead current from the hub to the axle andthe hub being retained on the axle by anged caps. It will be seen thatby virtue of the inward tension given to the s p-readers 26, the blocks23 will be forced outwardly to contact with the bushing 17 andcompensate for the Wear of the bushing.

and the said blocks. The axle 20 is secured within t1 customary manner,the same remaining stationary while the hub 7 rotates upon the same. Theaxle and bushing are lubricated by the oil or other lubricant containedwithin the hub 7, the lubricant working its Way to the axle. I

What is claimed is:

In a trolley-wheel, a tubular axle passing through the hub thereof andhaving elongated openings therein Within the hub, wearcompensating andcontact blocks disposed in said openings and having complementary harpof the trolley pole in the means of a pin 19' semi-conical grooves intheir ends, conical I In testimony that I claim the foregoing asSpreaders engaged 1n the grooves, caps enmy own, I have hereto affixedmy signature gaged on the ends of the axle, and havlng 1n the presenceof two witness-es.

flanges of larger diameter than the axle to v OHARLEY E. SMITH. retainthe hub on the axle and coil-springs Witnesses: colnpressibly disposedbetween the caps and J. M. FAHEY,

spreaders to force the blocks radially. R. WALSH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents I Washington, D. G.

